Lavender has a lot of wonderful properties beyond being a color.
In two different studies there were some interesting results.
One study, evaluating silexan, an oral lavender oil capsule compared to a benzodiazepine (lorazepam). Over a 6 week test, the two were compared for Generalised Anxiety Disorder (GAD).
Conclusion: Silexan was as effective as lorazepam in adults with GAD. Silexan is also considered safe since there is no potential for abuse>
The above was, with of course, the exception of the color version of lavender. No sisters abusing their brothers rooms by painting them lavender were included in the study.
Other studies show similar good results.